var crosshairTexture : Texture2D;
var position : Rect;

function Start(){

 position = Rect( ( Screen.width - crosshairTexture.width ) / 2, ( Screen.height -
  crosshairTexture.height ) / 2, crosshairTexture.width, crosshairTexture.height );
  
}

function OnGUI(){
 GUI.DrawTexture( position, crosshairTexture );
}